In an effort to shift people from cars to transit, D.C. council passed a $1 per day parking fee in 1994, but after Congress threatened to veto it, the city decided not to enforce it. The 1990 Clean Air Act amendments require all U.S. metropolitan areas to meet standards for air quality or risk losing federal transportation funds. .
The 1991 Intermodal Surface Transportation Efficiency Act made it easier for regions to use federal funds for transit, or bicycles. Both of these two laws that were created made it easier for the public to become aware of the link between transportation policy and air pollution. Washington was in need of installing cleaner polluting buses, because of the poor air quality. It required $50 million to take measures. An organization called the Coalition for Smarter Growth was created to begin acting locally on the problems that face Washington. For example, construction in the Gallery Place Metro station, which had been vacant shows how land can be redeveloped into lively housing, stores, and offices all within walking distance of the station. They figured instead of spending money on new schools in newer areas, they should rebuild and spend money on existing schools. Improving existing schools jumped from 34 percent in 1995 to 84 percent in 1998. A better mix of housing for different income levels would help reduce travel. The people who have to travel a long way to fill lower paying jobs in wealthy areas would be filled in by people if there could be mixed housing. Washington now realizes that building on previously used lands is a better way to become pedestrian friendly and decrease the use of pollution. .
During the Industrial Revolution as factories were built to take advantage of nearby mines and ironworks, the first railway was built in 1945 in Prague, Czech Republic. The city grew in both population and land area to about 1 million people by World War II. Prague remained relatively small and compact while Washington and Santiago were booming, because of the communist rule during the time.